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Validation of vitamin D-specific food frequency questionnaire against food records for Qatari women
(
MDPI
, 2020 , Article)
Measurement of vitamin D nutritional status through dietary assessment is cost effective. Food frequency questionnaire (FFQ) is usually validated against food records (FR). There is no vitamin D-specific FFQ for Qatar ...
Agreement level of vitamin D intake between food frequency questionnaire and 24-h food recall in young Qatari women
(
Emerald
, 2022 , Article)
Purpose – Prevalence of vitamin D insufficiency among young Qatari women is ∼85%. The purpose
of the study was to develop a food frequency questionnaire (FFQ) and to assess the degree of
agreement between food vitamin D ...